@Packrat Pragmatically, that's a much better way to handle it, for most scenarios, esp things like the Dervishes. Probably should have treated some things in separate categories, ie armor, high-speed cav stuff (whether literal cav or using the modern meaning), but just making stronger things worth more is decent overall. The degree of min-maxing the original system allowed and encouraged was nuts (including things like mixing unit types to shore up weak stats at lower cost) and totally untenable. I think I recall proving that system wise 1 BB could kill infinity of various troop types due to some weird special they had, etc.
If you ever do something and actually have troops, I offer system design help on setting up that side of it because there are some major pitfalls and do/don'ts in that whole arena :)